From 13626410c4d6db7fdc15ded5ee7865fcdbf0b88a Mon Sep 17 00:00:00 2001
From: Martin Kagamino Lehoux <martin@lehoux.net>
Date: Thu, 15 Jan 2026 22:05:38 +0100
Subject: refactor: transition to struct-of-arrays ECS architecture

- Replace individual Entity structs with centralized component slices in Game struct (SoA layout).
- Implement bitmask-based component lookup (CM_Position, CM_Move, etc.).
- Convert logic from object-oriented Update() methods to standalone Systems (UpdateMoveSystem, UpdateGatherSystem, UpdateSpawnSystem).
- Update rendering, selection, and input handling to iterate over component arrays.
---
 ecs/component.go | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

(limited to 'ecs/component.go')

diff --git a/ecs/component.go b/ecs/component.go
index 29ef967..ff22e53 100644
--- a/ecs/component.go
+++ b/ecs/component.go
@@ -1,10 +1,18 @@
 package ecs
 
-type Component[T any] struct {
-	IsEnabled bool
-	Value     T
-}
+type Mask uint16
 
-func C[T any](t T) Component[T] {
-	return Component[T]{IsEnabled: true, Value: t}
-}
+const (
+	CM_Position Mask = 1 << iota
+	CM_RelBounds
+	CM_Image
+	CM_Selection
+	CM_Move
+	CM_Order
+	CM_PatrolOrder
+	CM_GatherOrder
+	CM_ResourceGatherer
+	CM_ResourceSource
+	CM_ResourceStorage
+	CM_Spawn
+)
-- 
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